Seyed Saleh Behbahani

• Master of Science
• Islamic Azad University, Science and Research Branch

Since the invention of the microtunneling method (MT) in Japan in the 1970s, it has been utilized extensively, and the capability significantly expanded worldwide. For example, initially, MT could not be used to install polyvinyl chloride (PVC) pipes with low load bearing capacity. In 1987, with the development of the Enviriner method of low load b...

Composite material property testing usually requires multiple experiments if multiple variables, is time-consuming. The practice in many fields indicates that machine learning models have great potential in solving this problem because they can predict the material properties through the existing data. In this paper, a hybrid model combining multi-...

The vertical tunneling (lifting) method was invented in China to build hydraulic tunnels efficiently, safely, and conveniently. This paper presents a case study of a hydraulic tunnel in Beihai, China. In this study, the jacking force of five standpipes is analyzed and a back analysis principle of the average frictional coefficient is proposed. The...

Due to the lack of living space and the increase in population, there has been a construction boom in the underground space to improve the quality of human life. Tunnel engineering plays a vital role in the development of underground space. In addition to traditional methods, some intelligent methods such as artificial neural networks (ANNs) have b...

With the accelerated construction and aging of underground oil and gas pipelines, trenchless technology (TT) has developed rapidly in recent years. This paper briefly introduces the trenchless installation, repair (rehabilitation), replacement and cleaning technologies that can be used for oil and gas pipelines. Advantages, limitations, technical f...

The leakage of oil and gas pipelines may cause significant safety accidents and economic losses. In order to reduce the probability of pipeline failure, leak detection of pipelines is an effective measure. This paper introduces the existing detection methods that can be used in oil and gas pipelines, and analyses their advantages, limitations, appl...

Water jet technology has been widely used for many years. It is an effective and clean approach for breaking, cutting or cleaning materials. Nozzle is the crucial component for implementing the water jet technology in practice. The structural parameters of nozzle directly determine its hydraulic performance. In the meantime, the nozzle’s hydraulic...

Jacking force is one of the crucial parameters for pipe structure design, selection of pipe jacking machine and shaft structure design during jacking process. To predict the jacking force more accurately, this paper summarizes four calculation methods of curved jacking force. The Japan Micro Tunneling Association (JMTA) Method is based on Terzaghi...

The Trenchless Technology Center (TTC) is an industry/university/government research center at Louisiana Tech University. For 27 years, TTC has served as a global leader for the development of technologies influencing almost every aspect of trenchless construction methods. TTC conducted the Auger Boring School and the Utility Investigation School i...

DOI: 10.5176/2301-394X_ACE17.11 Authors: Seyed Saleh Behbahani, Tom Iseley and Randall Cooper Abstract: The cost of corrosion (both internal and external) in water distribution pipes and home plumbing in the U.S. has been estimated at about $700 million per year (EPA, 1984). More recent data compilations show about 240,000 water main breaks in the...

For keeping an open-pit mine operational while a giant sliding mass exists and is flowing on the benches and minerals like debris, at this time, it is necessary to unload the sliding mass (debris). For achieving this, monitoring of sliding mass should be done along with unloading so that displacement and velocity values do not exceed a certain limi...

When instability is observed in the walls of open pit mining, at this time, engineers are faced with a moving mass which is a combination of materials that move on each other and on the main slip surface. Modeling of this movement can have an effective assistance to mining engineers to predict the movement behavior, displacement estimate, and the m...